A　grid　structure＇s　dynamic　performance　considering　soil-structure　dynamic　interaction　(SSDI)　was　analyzed　using　the　integral　finite　element　method.　ABAQUS　and　FORTRAN　programs　were　adopted　to　realize　applying　accurately　viscoelastic　artificial　boundaries,　developing　the　geostatic　procedure　for　obtaining　stress　equilibrium　state　of　soil　self-weight　and　ground　motion　input　under　viscoelastic　artificial　boundaries.　A　numerical　example　was　used　to　verify　the　validity　and　rationality　of　finite　element　calculation　process.　Then,　a　three-dimensional　finite　element　integral　model　was　established　to　analyze　the　effect　of　SSDI　on　a　grid　structure＇s　dynamic　performance.　The　integral　model　consisted　of　a　grid　dome,　a　support　structure　and　foundation　soil.　The　results　showed　that　the　natural　periods　of　the　grid　structure　are　longer　with　soil　layer　becoming　softer　considering　SSDI,　and　its　natural　frequencies　become　more　intensive　compared　to　the　rigid　foundation　assumption;　the　peak　acceleration　of　foundation　bed　increases　5%~30%　compared　to　the　free　field　peak　acceleration,　and　the　softer　the　soil　layer　the　higher　therising　level;　furthermore,　the　node　acceleration　and　horizontal　relative　displacement　of　the　grid　structure　increase　considering　SSDI,　and　the　node　horizontal　relative　displacement　of　the　grid　structure　increases　gradually　with　soil　layer　becoming　softer.